He organized a legal defense fund for his daughter Monica during an inquiry into her relationship with President Bill Clinton.
After his schooling and training was complete, he began working in 1977 at the Western Tumor Medical Group as a junior assistant.
[2][5] Lewinsky is a board-certified radiation oncologist who is among the top 15% of breast cancer researchers in terms of publication volume, according to Vitals.com.
[11] Lewinsky is a Fellow of the American College of Radiology and also serves on the Medical Advisory Board of The Wellness Community Valley/Ventura, a cancer support organization.
[19][20] His photographs are displayed in a "healing art gallery" at the West Hills radiation therapy center plus 20 medical offices across the country.
[6][21] Lewinsky has published a book of his photographs titled Nature – Our Healing Partner that is primarily aimed at his patients.
[22][5] In January 2002, a number of his works were featured at the G. Ray Hawkins Gallery in an exhibit titled "The Healing Arts".
[25] In a 1998 CNN interview, he described Monica's defense attorney William H. Ginsburg as a "close friend", and spoke out against government and media scrutiny of his daughter.